fix: repair SSO auto-login and remove repo artifacts

- Add missing fetchT dep to session-handlers.js (fixes ctx is not
  defined error that broke jellyfin/emby/plex/syncthing SSO)
- Replace all ctx.fetchT calls with direct fetchT usage
- Remove server-old.js (69K monolith backup) from tracking
- Remove AI-generated doc artifacts from repo root
- Update .gitignore to prevent re-adding these files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -43,12 +43,18 @@ TEST-RESULTS.md
 TESTING-GUIDE.md
 DashCA-Plan.md
 vhdx-cleanup-instructions.md
+DESLOPIFICATION-ROADMAP.md
+SECURITY-IMPROVEMENTS.md
+WHAT-IS-DASHCADDY.md
+error-handling-cleanup-summary.md
+error-handling-migration-complete.md
 
 # Utility scripts (local only)
 check-e.ps1
 disk-scan.ps1
 disk-scan2.ps1
 fix-wsl-and-mount.ps1
+fix-ctx-routes.sh
 import-services.js
 
 # OS files